Drag-saw



UNITED STATES NATHAN K. WATSON, on WRIGHTSVILLE, GEORGIA.

DRAG-SAW.

sPEcImcATIoN forming part of Letters Patent No. 275,443, dated April 10,1883.

Application filed October 21, 1882. (No model.)

To all whom it may concern:

Be it known that I, NATHAN K. WATsoN, of Wrightsville, in the county ofJohnson and State of Georgia, have invented certain new and usefulImprovements in Drag-Saws; and I do hereby declare the following to beafull, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, referencebeinghad to the aceompanyingdrawings, and to lettersof reference marked thereon, which form apart of this specification.

My invention relates to an improvement in drag-saws, the object of thesame being to provide a saw-frame one end of which rests on the groundwhile the other ends rest on and dogs the wood being sawed.

A further object of-my invention is to provide means for guiding the sawand adjusting it vertically, so as to accommodate it to difi'ercutthicknesses of logs; and with these ends in view my invention consistsin certain details in construction and combinations of parts, as will bemore fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a longitudinal sectional viewof my improved machine, and Fig. 2 is a plan view thereof.

A. represents the end standard, composed of the two upright beams a andthe base-beam b, the said beams being strengthened and held in positionby the braces c. The two horizontal beams B are secured to the beams onnear the upper ends thereof, and are separated and held in position neartheir outer or free ends by the metallic bridged, which latter is curvedslightly, as shown in thedr'awings, so as to enable the saw to movefreely without engaging therewith. ThesebeamsBarefurther strengthened intheir positions by the diagonal braces d, which latter are secured attheir opposite ends to the under side of the beams B and the front facesof the upright beams a. The two beams B are separated sufficiently forall necessary purposes, and each is provided on its inner face with anoblong groove or guide, f, in which the sliding block 0 rests and moves.This sliding block 0 is provided on opposite sides with the flanges g,adapted to rest and move in the oblong groovesf, and on its near I endwith the two rearwardly-extending arms h, between which the front end ofthe pitman D is pivotally secured. This block 0 is also provided on itsupper or superior surface with the upright slotted standard E, by meansof which the saw is adjusted vertically, so as to accommodate it to logsof different diameters. The sliding block 0 is provided immediately infront of the upright standard E with an opening or perforation, h, forthe passage of the adjustable rod F, which latter is provided at itslower end with means for the attachment of the saw thereto, and itsupper enlarged end or head with the screw-bolt i, the shank of whichlatter passes through the oblong slot in the standard E, and is securedtherein in any desired vertical adjustment by the thumb-nut J. Thus itwill be seen that as the rod F is moved up or down it carries with itthe rear end of the saw G, and thereby enables the latter to work in aposition as nearly horizontal as is possible. When sawing a large logthe sliding rod F would be moved upward to the proper position andsecured, and when sawing a small one the movement thereof would be thereverse.

B, and are adapted to engage with the log be ing sawed and dog the same,and at the same time hold the saw-frame in position.

J are two lugs, secured to the side beams and-projecting inwardly, so asto afford a rest for the saw G when the latter is not in use. The rearend of the pitman D is connected to the crank-shaft l, by means of whichlatter motion is imparted thereto. This crank is jonrnaled in the boxesI, and is operated by the handle m, secured to one end thereof,and isprovided on its opposite end with the large gear-wheel, n, which latteroperates the large fly-wheel H through the intervention of the smallgear-wheel, n. The large fly-wheel H equalizes the applied power andprevents the saw from jerking, as is seen with the saw how commonlyused. When power is applied to the operating-handle the saw G isreciprocated by means of the pitman, which latter converts the rotarymotion of the crank-shaft into a reciprocating motion, and consequentlymoves the saw backward and forward.

I are books secured in the ends of the beams v My improvement is simplein construction, is of few parts, is easy of operation, and can bemanufactured at a small initial cost.

It is evident that slight changes in the construction of the differentparts might be resorted to without departing from the spirit of myinvention, and hence I would have it understood that I do not limitmyself to the exact construction of parts shown, but considermyselfatliberty to make such changes as come within the spirit and scopeof my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a drag-saw, the combination, with a frame consisting of horizontalbeams provided at one end with hooks adapted to engage with the log andat the other end with supporting standards, of a slide adapted toreciprocate in guides formed in said beams, and a saw connected withsaid slide by means of a rod, substantially as set forth.

2. In a drag-saw, the combination, with the horizontal beams provided atone end with hooks adapted to engage with the log. and at the other endwith supporting'standards, of a slide adapted to reciprocate in guidesformed in said beams, a saw connected with the slide, and a crank-shaftand suitable gearing mounted on the frame for reciprocating the saw,substantially as set forth.

3. In a drag-saw, the combination, with the beams B B and slideconstructed with an upwardly-projecting arm provided with an elongatedslot, of the saw G, rod F, bolt and nut for securing the rear end of thesaw in any desired vertical adjustment, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this9th day of Septenr her, 1ss2.

NATHAN K. 'WATSON.

Witnesses:

J. M. MASON, M. H. MAsoN.

